White Noise Generator
Play white, pink, or brown noise to fall asleep faster, mask distractions, and focus. No download — it runs right in your browser.
Trouble sleeping most nights?
White noise masks the symptom. Mochi Zen's RTT Insomnia program works on why your mind won't switch off — plus a full sleep-hygiene toolkit, guided sessions, and journaling.
Start the Sleep program free →What is white noise?
White noise is a steady, even sound that contains every audible frequency at equal intensity — like the hum of a fan or static between stations. Because it's consistent, it masks sudden noises (a door, a car, a snoring partner) that would otherwise jolt your brain back to alertness, helping you fall asleep and stay asleep.
White vs. pink vs. brown noise
White noise
Equal energy across all frequencies. Bright and full — best for masking a wide range of background sounds.
Pink noise
More energy in the lower frequencies, so it sounds softer and more balanced — like steady rain. Many people find it the most soothing for sleep.
Brown noise
Even deeper, with the most low-frequency energy — like a low waterfall or distant thunder. Great for focus and for anyone who finds white noise too harsh.
How it helps sleep
Most insomnia is anxiety-driven — a nervous system that treats quiet as a cue to stay alert and start thinking. A consistent sound floor gives your brain something neutral to rest on, softens the contrast that makes sudden noises startling, and signals that it's safe to let go. Pair it with a consistent bedtime and a wind-down routine for the best results.